CN214766702U - High-barrier flexible packaging structure - Google Patents
High-barrier flexible packaging structure Download PDFInfo
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- CN214766702U CN214766702U CN202023083208.4U CN202023083208U CN214766702U CN 214766702 U CN214766702 U CN 214766702U CN 202023083208 U CN202023083208 U CN 202023083208U CN 214766702 U CN214766702 U CN 214766702U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a high resistant flexible packaging structure that separates nature, include: the composite material comprises a polymer layer and a heat sealing layer, wherein a graphene layer is arranged between the polymer layer and the heat sealing layer, a mixed slurry layer is arranged between the polymer layer and the graphene layer, and a mixed slurry layer is arranged between the heat sealing layer and the graphene layer; thus, on the one hand, using an impermeable graphene layer as a core barrier and a polymer layer as an outer protective encapsulation, the permeability to oxygen and moisture can be significantly reduced by the synergy between the barrier and the protective encapsulation; on the other hand, the mixed slurry layer is used as a buffer layer between the polymer layer and the graphene layer, so that the adhesion of graphene on the polymer film is greatly increased, and a very good barrier capability is created.
Description
Technical Field
The utility model relates to an energy storage device technical field especially relates to a flexible packaging structure of high resistant separation nature.
Background
With the rapid development of mobile devices and wearable devices, the devices have higher requirements on the flexibility of batteries used by the devices, and also have higher requirements on packaging materials of the batteries.
At present, the battery in the development stage is made of the existing battery packaging material, high mechanical strength and flexibility cannot be considered, and meanwhile, the packaging material also needs to have high water vapor barrier property and oxygen barrier property.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a high-barrier flexible packaging structure with excellent properties of blocking water and oxygen small molecules and repeated stretchability.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
in a first aspect, an embodiment of the present invention provides a flexible packaging structure with high barrier property, including: the composite material comprises a polymer layer and a heat sealing layer, wherein a graphene layer is arranged between the polymer layer and the heat sealing layer, a mixed slurry layer is arranged between the polymer layer and the graphene layer, and a mixed slurry layer is arranged between the heat sealing layer and the graphene layer.
The graphene layer comprises graphene, a graphene core and a graphene layer, wherein the particle size of the graphene in the graphene layer is 0.5-10 mu m, the number of the graphene layers is N, N is larger than or equal to 1 and smaller than or equal to 6, and N is a positive integer.
Wherein the polymer layer material comprises Polyethylene terephthalate (PET) or Biaxially oriented nylon film (BOPA), or Polyethylene (PE) or O-phenylphenol (OPP).
Wherein, the thickness of the polymer layer is 10-100 um.
The embodiment of the utility model provides a pair of high resistant flexible packaging structure of separation nature and preparation method thereof, include: the composite material comprises a polymer layer and a heat sealing layer, wherein a graphene layer is arranged between the polymer layer and the heat sealing layer, a mixed slurry layer is arranged between the polymer layer and the graphene layer, and a mixed slurry layer is arranged between the heat sealing layer and the graphene layer; thus, on the one hand, using an impermeable graphene layer as a core barrier and a polymer layer as an outer protective encapsulation, the permeability to oxygen and moisture can be significantly reduced by the synergy between the barrier and the protective encapsulation; on the other hand, the mixed slurry layer is used as a buffer layer between the polymer layer and the graphene layer, so that the adhesion of graphene on the polymer film is greatly increased, and a very good barrier capability is created.
Description of the drawings:
fig. 1 is a schematic structural diagram of a high barrier flexible package structure according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a manufacturing method of a high barrier flexible package structure according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating a water vapor transmission rate test of a high-barrier flexible package structure according to an embodiment of the present invention.
In the figure, a polymer layer 1, a heat seal layer 2, a graphene layer 3, and a mixed slurry layer 4.
Detailed Description
For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art. The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, the embodiment of the present invention provides a high barrier property flexible packaging structure, which is characterized in that, include: the heat-sealing adhesive comprises a polymer layer 1 and a heat-sealing layer 2, wherein a graphene layer 3 is arranged between the polymer layer 1 and the heat-sealing layer 2, a mixed slurry layer 4 is arranged between the polymer layer 1 and the graphene layer 3, and the mixed slurry layer 4 is arranged between the heat-sealing layer 2 and the graphene layer 3; thus, on the one hand, using the impermeable graphene layer 3 as a core barrier and the polymer layer 1 as an outer protective encapsulation, the permeability to oxygen and moisture can be significantly reduced by the synergy between the barrier and the protective encapsulation; on the other hand, the use of the mixed slurry layer 4 as a buffer layer between the polymer layer 1 and the graphene layer 3 greatly increases the adhesion of graphene on the polymer film, thereby creating a very good barrier capability.
Here, the type of graphene may be chemical method graphene, physical method graphene, chemical method and physical method mixed graphene, and is not particularly limited.
In one embodiment, the graphene particle size in the graphene layer 3 is 0.5-10 μm, the number of the graphene layers 3 is N, wherein N is greater than or equal to 1 and less than or equal to 6, and N is a positive integer.
Here, the larger the graphene sheet size, the closer the number of layers to a single layer, the lower the defect level and the better the barrier properties.
In one embodiment, the material of the polymer layer 1 includes Polyethylene terephthalate (PET) or Biaxially oriented nylon film (BOPA), or Polyethylene (PE) or O-phenylphenol (OPP).
In one embodiment, the polymer layer 1 is 10-100um thick.
Referring to fig. 2, an embodiment of the present invention provides a method for manufacturing a high barrier flexible package structure, where the method includes:
step S101: tailoring a polymer to a first dimension as a polymer layer;
here, the first size may be set according to the requirement of the manufactured high-diaphragm flexible packaging material, such as a flexible battery, and may be set according to the size of the flexible battery to be packaged.
Step S102: melting a polymer and graphene into a first solution to obtain a first mixed solution mixed with the graphene and the polymer, and coating the first mixed solution on the surface of the polymer layer to obtain a mixed slurry layer;
the first mixed solution is coated on the surface of the polymer layer and then dried, wherein the drying temperature can be 60-120 ℃, and the drying time is 0.5-3 h.
Step S103: blending graphene into the first solution to obtain a second mixed solution mixed with graphene, and coating the second mixed solution on the surface of the mixed slurry layer to obtain a graphene layer;
and coating the second mixed solution on the surface of the mixed slurry layer, and drying, wherein the drying temperature can be 60-120 ℃, and the drying time is 0.5-3 h.
Step S104: coating the first mixed solution on the surface of the graphene layer to obtain a mixed slurry layer;
and coating the first mixed solution on the surface of the graphene layer, and drying, wherein the drying temperature can be 60-120 ℃, and the drying time is 0.5-3 h.
Step S105: and coating a hot-melt adhesive film on the surface of the mixed slurry layer, and carrying out heat sealing and hot pressing to obtain a heat sealing layer.
In the above embodiments of the present invention, the impermeable graphene is used as the core barrier, the polymer layer is used as the outer protective encapsulation, and the permeability of oxygen and moisture can be significantly reduced by utilizing the synergistic effect between the barrier and the protective encapsulation; the graphene and polymer mixed slurry is used as a buffer layer between the polymer layer and the graphene layer, so that the adhesion of the graphene layer on the polymer layer is greatly improved, and a very good barrier capability is created; the adopted preparation method is simple and environment-friendly, and the flexible lithium ion battery coating material is used as a flexible lithium ion battery coating material, so that the production cost is greatly reduced, and the mass production and commercialization are very easy to realize; the utility model discloses the high flexible packaging structure of barrier property that obtains is applicable strong, except the packaging material that can be used to the battery, all has very wide application prospect in food, pharmacy, chemistry and electron trade.
In one embodiment, the coating of the hot-melt adhesive film on the surface of the mixed slurry layer and the heat sealing to obtain the heat sealing layer comprises:
and coating a hot-melt adhesive film on the surface of the mixed slurry layer, and carrying out hot pressing by using a laminating machine to obtain the high-barrier flexible packaging structure, wherein the hot-sealing temperature is 100-200 ℃, the hot-pressing pressure of the laminating machine is 1000-3000 pounds, the hot-pressing temperature is 80-120 ℃, and the hot-pressing time is 0.5-1 h.
In one embodiment, the first solution comprises at least one of N-Methyl pyrrolidone (NMP), DBE, DMF, water.
In one embodiment, the melting a polymer and graphene into a first solution to obtain a first mixed solution mixed with the graphene and the polymer, and applying the first mixed solution to the surface of the polymer layer to obtain a mixed slurry layer includes:
the method comprises the steps of melting graphene and a polymer into a first solution according to a ratio of 1:15-25, obtaining a first mixed solution mixed with the graphene and the polymer, and coating the first mixed solution on the surface of the polymer layer to obtain a mixed slurry layer, wherein the coating thickness of the mixed slurry layer is 1-20 microns.
In an embodiment, the melting graphene into the first solution to obtain a second mixed solution mixed with graphene, and coating the second mixed solution on the surface of the mixed slurry layer to obtain a graphene layer includes:
fusing the graphene and the first solution according to a ratio of 1:10-50 to obtain a second mixed solution mixed with the graphene, and coating the second mixed solution on the surface of the mixed slurry layer to obtain a graphene layer, wherein the coating thickness of the graphene layer is 1-50 um.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the scope of the invention.
In this embodiment, the polymer substrate is PET, and the polymer substrate has a thickness of 20 um; the particle size of the graphene is 5 μm; the number of graphene layers is single; the graphene polymer blend liquid comprises the following components in percentage by weight: the ratio of graphene to polymer is 1:19, and the types of solvents used are: DBE, the ratio of total solids to solvent is 1: 3; the coating thickness of the graphene polymer blending liquid is 5 um; the drying temperature of the film is 100 ℃, and the drying time is 1 h; the proportion of the graphene solution in the step B) is as follows: the types of solvents used are: NMP, the ratio of graphene to solvent is 1:19, and the coating thickness of the graphene solution is 5 um; the drying temperature of the film is 100 ℃, and the drying time is 1 h; the relevant parameters of the graphene polymer blending liquid in the step C) are consistent with those in the step A); the hot melt adhesive film in the step D) is a CPP film, and the heat sealing temperature is 150 ℃; the hot-pressing pressure of the laminator was 2000 lbs, the hot-pressing temperature was 100 deg.C, and the hot-pressing time was 1 h.
Here, the detection conditions (GB/T26253-2010) are: temperature: 25.5 ℃; relative humidity: 56 percent; carrier gas: 99.999% N2(ii) a Humidity: 100 percent; test area: 5mm2。
Referring to fig. 3, the initial water vapor barrier rate of the high-barrier flexible package structure can reach 1.3 × 10-4g/(m2Day); can still achieve the purpose after 24 hours of moisture permeationTo 5X 10-3g/(m2·day)。
Further, the high-barrier flexible package structure was subjected to a flexibility test under test conditions of a bending radius R of 1.5mm and a bending tensile tension of 9.8N, and the results are shown in table 1.
| Test conditions | State after bending |
| Number of bending 5000 times | Without change |
| Number of bending 10000 times | The polymer layer appeared creased, but the graphene layer was crack-free |
| Number of bending 20000 times | Slight cracks of the graphene layer |
| Number of bending 50000 times | The polymer layer is cracked, and the graphene layer is partially separated |
TABLE 1
According to the embodiments, on one hand, the high-barrier flexible packaging structure provided by the utility model uses the impermeable graphene layer as the core barrier and the polymer layer as the external protective packaging, and the permeability of oxygen and moisture can be significantly reduced by utilizing the synergistic effect between the barrier and the protective packaging; on the other hand, the mixed slurry layer is used as a buffer layer between the polymer layer and the graphene layer, so that the adhesive force of graphene on the polymer film is greatly increased, and the good barrier capability is created, and meanwhile, the graphene has strong bending capability.
The following description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention are all included within the protection scope of the present invention.
Claims (3)
1. A high barrier flexible package structure, comprising: the composite material comprises a polymer layer and a heat sealing layer, wherein a graphene layer is arranged between the polymer layer and the heat sealing layer, a mixed slurry layer is arranged between the polymer layer and the graphene layer, and a mixed slurry layer is arranged between the heat sealing layer and the graphene layer.
2. The high-barrier flexible packaging structure of claim 1, wherein the graphene in the graphene layer has a particle size of 0.5-10 μm, the number of graphene layers is N, where N is 1 or more and 6 or less, and N is a positive integer.
3. The high-barrier flexible packaging structure of claim 1, wherein the polymer layer has a thickness of 10-100 um.
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| CN202023083208.4U CN214766702U (en) | 2020-12-18 | 2020-12-18 | High-barrier flexible packaging structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114643186A (en) * | 2020-12-18 | 2022-06-21 | 晨柔点智能科技(北京)有限公司 | High-barrier flexible packaging material and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643186A (en) * | 2020-12-18 | 2022-06-21 | 晨柔点智能科技(北京)有限公司 | High-barrier flexible packaging material and manufacturing method thereof |
| CN114643186B (en) * | 2020-12-18 | 2024-02-20 | 晨柔点智能科技(北京)有限公司 | High-barrier flexible packaging material and manufacturing method thereof |
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Effective date of registration: 20220124 Address after: 101200 room 303-21704, No. 4, South Community, Binhe street, Pinggu District, Beijing Patentee after: Beijing Chenxi roudian enterprise management partnership (L.P.) Address before: 421000 weishang formation, Gongping village, Jiangkou Town, Hengnan County, Hengyang City, Hunan Province Patentee before: Liao Xiangbiao |
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Effective date of registration: 20220509 Address after: 100020 room 25, 1601, floor 16, building 3, courtyard 6, lizexi street, Chaoyang District, Beijing Patentee after: Chenroudian Intelligent Technology (Beijing) Co.,Ltd. Address before: 101200 room 303-21704, No. 4, South Community, Binhe street, Pinggu District, Beijing Patentee before: Beijing Chenxi roudian enterprise management partnership (L.P.) |